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Old 07-18-2010, 08:56 PM
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Default Can you flush an outboard with muffs while tilted up?

If want to flush a Tohatsu 30hp with muffs while the boat is in the water, can the motor be run in the fully tilted position for a few minutes while it flushes, thus avoiding having to put the lower unit back in the saltwater and risk intrusion of some seawater into the system while flushing?
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Old 07-18-2010, 10:07 PM
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I don't know why not. Might be sort of iffy if you have side-draft carbs, they'd be almost upside down, but should still work.
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Old 07-19-2010, 04:06 AM
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Don't see why not. When I am docked in saltwater, I tilt my 90hp Johnson up to flush it, and that is the way I've seen others with different make/models do it as well.
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Old 07-19-2010, 05:31 AM
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Or just don't flush it until the end of the season.
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Old 07-19-2010, 07:03 AM
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Did it all the time with my boys old Whaler 40HP Merc, and my friend does it with his 150HP Johnson. They were/are both two strokes, but we regularly flushed them at the end of each weekend. Tilted them down just enough so that the pick-up/ear-muffs were just above the water while running. No ill effects after 6 seasons. Also would pull the fuel line after a couple minutes and let the fuel run out on the Merc.
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Old 07-19-2010, 08:59 AM
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Do four stroke outboards have dry-sump oiling?

I would not turn a car ninety degrees and run engine because the oil pump would suck air not oil. The only exception to this in the US automotive world would be a Z06 Corvette which has dry sump oiling. Dry sump oiling has an external oil reservoir tank with no oil stored in oil pan of engine.


If your outboard did not come with a hose flush connection, maybe your dealer can set you up............
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Old 07-19-2010, 09:43 AM
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The Tohatsu is a 4-stroke EFI. Sound's like a 4-stroke may need to be run in the down position in order to achieve proper lubrication???
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Old 07-19-2010, 12:02 PM
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Quote:
Originally Posted by fishtales66 View Post
The Tohatsu is a 4-stroke EFI. Sound's like a 4-stroke may need to be run in the down position in order to achieve proper lubrication???
Don't 4-strokes use pressurized lube systems? Shouldn't matter what the motor angle is...
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Old 07-19-2010, 12:17 PM
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Where is the oil pickup? I have never flushed while tilted up on my 4-strokes, not because I know anything, my mech. has never been able to tell me a definiitive yes or no on that, so I don't want to gamble a rebuild on it. I use muffs with the motor down in the water, then tilt up on the last 20 seconds of flushing and then turn off when the motor is out of the water. So far (13 years on 4-strokes) so good..
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